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callousness, hardness, unfeelingness, callosity, insensibility | devoid of passion or feeling; hardheartedness | ||
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hardness | the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale | ||
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hardness, ruggedness | the quality of being difficult to do | ||
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severity, severeness, harshness, rigor, rigour, rigorousness, rigourousness, inclemency, hardness, stiffness | excessive sternness | ||
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hardness | a quality of water that contains dissolved mineral salts that prevent soap from lathering |